Broaching process method for small-modulus internal gear

Abstract

The invention provides a broaching process method for a small-modulus internal gear. The broaching process method comprises an ejector rod, a lower chuck, a flange plate, a workpiece, a broach and anupper chuck. The broaching process method is characterized in that the lower chuck is provided with a lower clamping jaw and a limiting key, wherein the flange plate is provided with an anti-skid jaw;the broach is provided with a rough broaching part and a fine broaching part; and the upper chuck is provided with an upper clamping jaw. The broaching process method comprises the steps that firstly, the workpiece is mounted on the anti-skid jaw of the flange plate; secondly, the broach penetrates through the workpiece and the flange plate and then is inserted into the lower chuck; thirdly, thelower clamping jaw is automatically inserted into a clamping groove in the handle part of the broach, and the ejector rod abuts against the end face of a front handle of the broach and clamps the broach together with the limiting key; fourthly, the upper chuck moves downwards and clamps a rear handle of the broach together with the upper clamping jaw; and finally, the workpiece is adjusted to be placed at the front guide position of the broach, and a machine tool workbench is started to move upwards to drive the workpiece to enter the broach for cutting the part.

Description

technical field [0001] The invention relates to the technical field of internal gear broaching, in particular to a broaching process for small modulus internal gears. Background technique [0002] Similar to the spline broaching process, it has been widely used in internal gear broaching in recent years because of its advantages of high efficiency and low cost. Since the precision of the gear, especially the precision of the tooth shape, is much higher than that of the spline, such as the gradual forming broaching principle of the traditional spline broach, such as figure 1 As shown in (a), the workpiece is self-positioning relative to the broach. On the one hand, the straightness (or helix) of the healthy teeth of the broach and the straightness of the machine tool guide rail have a direct impact on the tooth profile of the workpiece. The cutting stroke of the broach The longer the broach, the greater the effect. On the other hand, the tooth side of the broach has a backla...

AI Technical Summary

Problems solved by technology

However, the same-profile broaching is tooth side cutting. When the gear parameter is less than 1.0 modulus, the tooth tip of the broach with small tooth width is too sharp, the rigidity is not enough and the chip removal space is limited, so the same-profile cutting method cannot be realized. In addition, the production cost of the same profile broaching broach is also very high

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